Sig Sauer Cal-X Kit SIGMCX 5.56 NATO 11.5" Tapered Lug CALX-MCX-11B-556-TAP

Faxon Firearms Mid-Length Button Rifled Gunner Barrel 5.56x45mm 16", Black

Faxon Firearms M4 Button Rifled Barrel 5.56x45mm 16", Black

Faxon Firearms Mid-Length Button Rifled Pencil Barrel 5.56x45mm 16", Black

FN America AR-15 16" Barrel 556NATO 1:7 Twist Button Broached, Black - 20100039

Ballistic Advantage Performance Barrel 5.56x45mm 13.70", Black - Compact and Efficient Barrel - BABL556036F

SIG SAUER MCX-R Regulator 5.56 NATO 16" 10rd - FDE

Faxon Firearms FXSPT556105SA9 Sport 5.56 NATO 30+1 10.50 Black Nitride SOCOM Threaded Barrel, Aluminum Receiver w/Picatinny Rail, M-LOK Handguard, Black Polymer KAK Shockwave Pistol Brace, Ergonomic